Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab199f4c69dc1b3…

MALICIOUS

PDF

91.4 KB Created: 2021-03-09 00:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 08debedc74dfead23722591ef59877fc SHA-1: c3ae3625ae8661052dafd9de3ca2ad3163f37939 SHA-256: 8ab199f4c69dc1b38fe563d94f2657969890f6b628155343ff08c4c481ac6fa9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/award?keyword=motor+monofasico+con+capacitor+de+arranque+pdf PDF link annotation
    • http://jiteruruw.sportsontheweb.net/will_there_be_a_season_2_of_the_night_manager.pdfIn PDF document text
    • http://martans.space/dd_5e_dragon_statsu1g71.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/hcheKhe/send_files_to_tv_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/wapadofiwe/hh9Iq1z/best_beard_grooming_kit_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/hh0jgje/68349914117.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/dXjdjdV/best_online_stock_trading_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/ibOibyG/celestial_assault_reloaded_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/oRiiehi/tewanajevedorutapevuxepo.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/Gjd6Mhc/icon_checklist_di_excel.pdfIn PDF document text
    • http://bellissimo.online/28292009369itgs4.pdfIn PDF document text
    • http://muldwych.com/548502246110sbmh.pdfIn PDF document text
    • http://kigumelez.medianewsonline.com/nanuxusubasepisiferof.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/gf2EheM/83096748326.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/66dFgfV/hindustan_times_epaper_delhi.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/bkU7rgM/36093926174.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_41dc3d5614ea42f99ecff5e5391bf836.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lunojol/62997162579.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_c05055b7d21f4c1b938b790b80a73148.pdf?index=trueIn PDF document text
    • http://japinoxizidunub.myartsonline.com/24385741693.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/98423150982.pdfIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_bb7439f8dd774270b8605615537c35f5.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_4e80774bf1b24b99b461c2c19146e588.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bugutaj/json_formatter_sublime_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/birthday_wishes_for_husband_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/guxamixoxeworuweloku.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/69732241787.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_8f58e2aa48bd4dea818cf63526af7eb5.pdf?index=trueIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/logitech_k800_battery.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A74 5284 bytes
SHA-256: 50d90d1918d56901466ad9206cc39b100e071353fddff890291d441e5482a1a2
font_01_sfnt_off00012c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4B 10948 bytes
SHA-256: 7936d9905870a7dc23754d586916690041309be3b541348e77986cb3affb4759
font_02_sfnt_off0001519a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3